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Register auxiliary module to create ibdevice for ionic ethernet adapter. Co-developed-by: Andrew Boyer <andrew.boyer@amd.com> Signed-off-by: Andrew Boyer <andrew.boyer@amd.com> Co-developed-by: Allen Hubbe <allen.hubbe@amd.com> Signed-off-by: Allen Hubbe <allen.hubbe@amd.com> Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com> Link: https://patch.msgid.link/20250903061606.4139957-9-abhijit.gangurde@amd.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
131 lines
3 KiB
C
131 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2018-2025, Advanced Micro Devices, Inc. */
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#include <linux/module.h>
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#include <linux/printk.h>
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#include <net/addrconf.h>
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#include "ionic_ibdev.h"
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#define DRIVER_DESCRIPTION "AMD Pensando RoCE HCA driver"
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#define DEVICE_DESCRIPTION "AMD Pensando RoCE HCA"
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MODULE_AUTHOR("Allen Hubbe <allen.hubbe@amd.com>");
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MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS("NET_IONIC");
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static void ionic_destroy_ibdev(struct ionic_ibdev *dev)
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{
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ib_unregister_device(&dev->ibdev);
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ib_dealloc_device(&dev->ibdev);
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}
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static struct ionic_ibdev *ionic_create_ibdev(struct ionic_aux_dev *ionic_adev)
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{
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struct ib_device *ibdev;
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struct ionic_ibdev *dev;
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struct net_device *ndev;
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int rc;
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dev = ib_alloc_device(ionic_ibdev, ibdev);
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if (!dev)
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return ERR_PTR(-EINVAL);
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ionic_fill_lif_cfg(ionic_adev->lif, &dev->lif_cfg);
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ibdev = &dev->ibdev;
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ibdev->dev.parent = dev->lif_cfg.hwdev;
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strscpy(ibdev->name, "ionic_%d", IB_DEVICE_NAME_MAX);
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strscpy(ibdev->node_desc, DEVICE_DESCRIPTION, IB_DEVICE_NODE_DESC_MAX);
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ibdev->node_type = RDMA_NODE_IB_CA;
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ibdev->phys_port_cnt = 1;
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/* the first two eq are reserved for async events */
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ibdev->num_comp_vectors = dev->lif_cfg.eq_count - 2;
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ndev = ionic_lif_netdev(ionic_adev->lif);
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addrconf_ifid_eui48((u8 *)&ibdev->node_guid, ndev);
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rc = ib_device_set_netdev(ibdev, ndev, 1);
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/* ionic_lif_netdev() returns ndev with refcount held */
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dev_put(ndev);
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if (rc)
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goto err_admin;
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rc = ib_register_device(ibdev, "ionic_%d", ibdev->dev.parent);
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if (rc)
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goto err_register;
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return dev;
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err_register:
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err_admin:
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ib_dealloc_device(&dev->ibdev);
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return ERR_PTR(rc);
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}
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static int ionic_aux_probe(struct auxiliary_device *adev,
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const struct auxiliary_device_id *id)
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{
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struct ionic_aux_dev *ionic_adev;
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struct ionic_ibdev *dev;
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ionic_adev = container_of(adev, struct ionic_aux_dev, adev);
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dev = ionic_create_ibdev(ionic_adev);
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if (IS_ERR(dev))
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return dev_err_probe(&adev->dev, PTR_ERR(dev),
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"Failed to register ibdev\n");
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auxiliary_set_drvdata(adev, dev);
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ibdev_dbg(&dev->ibdev, "registered\n");
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return 0;
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}
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static void ionic_aux_remove(struct auxiliary_device *adev)
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{
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struct ionic_ibdev *dev = auxiliary_get_drvdata(adev);
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dev_dbg(&adev->dev, "unregister ibdev\n");
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ionic_destroy_ibdev(dev);
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dev_dbg(&adev->dev, "unregistered\n");
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}
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static const struct auxiliary_device_id ionic_aux_id_table[] = {
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{ .name = "ionic.rdma", },
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{},
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};
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MODULE_DEVICE_TABLE(auxiliary, ionic_aux_id_table);
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static struct auxiliary_driver ionic_aux_r_driver = {
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.name = "rdma",
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.probe = ionic_aux_probe,
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.remove = ionic_aux_remove,
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.id_table = ionic_aux_id_table,
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};
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static int __init ionic_mod_init(void)
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{
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int rc;
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rc = auxiliary_driver_register(&ionic_aux_r_driver);
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if (rc)
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goto err_aux;
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return 0;
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err_aux:
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return rc;
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}
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static void __exit ionic_mod_exit(void)
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{
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auxiliary_driver_unregister(&ionic_aux_r_driver);
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}
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module_init(ionic_mod_init);
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module_exit(ionic_mod_exit);
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